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In this April 26, 2013 photo, choreographer Gemze de Lappe oversees a rehearsal of Rodgers and Hammerstein's "Oklahoma!" at the Lyric Opera of Chicago. De Lappe first danced in "Oklahoma!" in 1943 as a member of the Broadway hit's first national touring company and now 70 years later at age 91 she's choreographing a production of the musical at the Lyric. (AP Photo/M. Spencer Green)

In this April 26, 2013 photo, choreographer Gemze de Lappe oversees a rehearsal of Rodgers and Hammerstein's "Oklahoma!" at the Lyric Opera of Chicago. De Lappe first danced in "Oklahoma!" in 1943 as a member of the Broadway hit's first national touring company and now 70 years later at age 91 she's choreographing a production of the musical at the Lyric. (AP Photo/M. Spencer Green)